import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
          child: Padding(
        padding: EdgeInsets.all(10),
        child: Table(
          border: TableBorder.all(color: Colors.red, width: 2),
          children: <TableRow>[
            TableRow(children: [
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              ))
            ]),
            TableRow(children: [
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              ))
            ]),
            TableRow(children: [
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              )),
              TableCell(
                  child: Container(
                width: 50,
                height: 50,
                color: Colors.green,
              ))
            ])
          ],
        ),
      )),
    );
  }
}
